Tips on 727 build

Chris,
I plan on rebuilding my '74 Torqueflight next weekend. I have built a C-4 and C-6 back in my Ford days and never had a problem with them. I picked up a TCI technical overhaul manual and a TCI master overhaul kit P#128900. Previously, the trans had been making some funky groaning noises as power was applied in any gear as recall, also it was slipping bad in reverse when cold. I wil be replacing the torque converter and front pilot bearing (included in the kit) as the bearing surface on the TC looks pretty bad. Anything in particular I should look for once I get it cracked open? Also, any other rebuilding tips would be greatly appreciated!

Thanks!